Here's a derivation of HI-11 from HI-12:

 
 








 

        1. CCCpqrCsCCrCrtCqt                                               [HI-12]

D1.1 =  2. CpCCCqCCrCrsCtsCCqCCrCrsCtsuCr

D2.2 =  3. CCCpCCqCqrCsrCCpCCqCqrCsrtCqt

D1.3 =  4. CpCCCqrCCqrsCCCtCCqCquCvurs

D3.2 =  5. CCpCpqCpCrCsq

D4.4 =  6. CCCpqCCpqrCCCsCCpCptCutqr

D1.6 =  7. CpCCCCCqCCrCrsCtsuvCCCCqCCrCrsCtsuvwCCCruvw

D5.7 =  8. CCCCCpCCqCqrCsrtuCCCCpCCqCqrCsrtuvCwCxCCqtuv

D8.1 =  9. CpCqCCCrstCCtCtuCsu

D9.9 = 10. CpCCCqrsCCsCstCrt                                          [HI-11]

 

 
  Dolph Ulrich, 2007